The OPTOStokes LP550 Longpass Filter is a high-efficiency optical edge filter designed to sharply define spectral bands. With a precise cut-on wavelength at 550nm, this filter appears yellow/orange, effectively blocking ultraviolet, blue, and green wavelengths while transmitting yellow, red, and near-infrared light. Distinguished by its exceptional throughput, it offers a transmission rate greater than 94% across the 560nm-1100nm range, making it a critical optical component for light-starved imaging and sensing applications.
Technical Specifications
Manufactured using premium optical glass and advanced coating technologies, the LP550 ensures minimal signal loss and excellent environmental stability.
| Specification | Parameter / Value |
|---|---|
| Product Type | Longpass Filter (LP550) |
| Center Wavelength (Cut-on) | 550 ± 3nm |
| Passband (Transmission) | 560 - 1100nm @ T > 94% |
| Stopband (Blocking) | 350 - 540nm @ T < 0.1% |
| Thickness | 1.0mm |
| Surface Quality | 60/40 (Scratch/Dig) |
Key Applications
The LP550's combination of deep blocking and high transmission makes it versatile for various optical systems:
- Fluorescence Microscopy: Functions as a barrier filter to block shorter excitation wavelengths while passing longer fluorescence emissions.
- Spectral Analysis: Isolates the specific wavelength range of interest in multi-channel spectrometers.
- Machine Vision & Photography: Enhances contrast by eliminating atmospheric haze (UV/Blue scatter) and sharpening features in monochrome imaging.
- LIDAR & Sensors: Blocks visible noise while allowing NIR signal to pass.
Customization & Engineering Support
At OPTOStokes, we offer flexible manufacturing options to integrate our filters into your specific design.
- Size & Shape: Standard 1.0mm thickness available in square or round formats. We provide custom optical filters dicing services for non-standard housing.
- Performance Tuning: We can modify the cut-on wavelength (400nm-850nm) and blocking depth (OD) to meet specific sensor requirements.
- Mounting: Available unmounted or pre-mounted in anodized aluminum rings.
Why Choose the LP550?
Superior Signal-to-Noise: Unlike standard filters with lower transmission, our LP550 delivers a high transmission filter profile (T>94%), ensuring that your system captures the maximum amount of signal data while maintaining a dark background (T<0.1% blocking).
In Stock for Rapid Prototyping: Ensure your project stays on schedule with our reliable inventory. Contact our technical team at sales@optofilters.com for volume pricing or custom specification discussions.
